diff options
| author | Keith Packard <keithp@keithp.com> | 2014-07-05 00:04:06 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2014-07-05 00:38:10 -0700 |
| commit | 292cb8380b478542555b5f370e8252eafa2f74ac (patch) | |
| tree | c596a045bf49faefe845e42539691db7adbca8cc /src/kernel | |
| parent | e0ee2ac6bc68b73e13bf34fac3ffd4a3b79dce98 (diff) | |
altos: Rework packet receive for cc1120
Instead of blocking on PQT, just set up the receiver to start going
and when the first bit interrupt comes in, grab the SPI bus if
possible and configure it for reception. This improves sensitivity in
the radio by a significant amount while making the code conceptually a
bit nicer.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/kernel')
| -rw-r--r-- | src/kernel/ao.h | 3 | ||||
| -rw-r--r-- | src/kernel/ao_mutex.c | 23 |
2 files changed, 26 insertions, 0 deletions
diff --git a/src/kernel/ao.h b/src/kernel/ao.h index c11aa028..a225bc4a 100644 --- a/src/kernel/ao.h +++ b/src/kernel/ao.h @@ -132,6 +132,9 @@ ao_clock_init(void); */ #ifndef ao_mutex_get +uint8_t +ao_mutex_try(__xdata uint8_t *ao_mutex, uint8_t task_id) __reentrant; + void ao_mutex_get(__xdata uint8_t *ao_mutex) __reentrant; diff --git a/src/kernel/ao_mutex.c b/src/kernel/ao_mutex.c index 952ff462..a36fe939 100644 --- a/src/kernel/ao_mutex.c +++ b/src/kernel/ao_mutex.c @@ -17,6 +17,29 @@ #include "ao.h" +#ifndef HAS_MUTEX_TRY +#define HAS_MUTEX_TRY 1 +#endif + +#if HAS_MUTEX_TRY + +uint8_t +ao_mutex_try(__xdata uint8_t *mutex, uint8_t task_id) __reentrant +{ + uint8_t ret; + if (*mutex == task_id) + ao_panic(AO_PANIC_MUTEX); + ao_arch_critical( + if (*mutex) + ret = 0; + else { + *mutex = task_id; + ret = 1; + }); + return ret; +} +#endif + void ao_mutex_get(__xdata uint8_t *mutex) __reentrant { |